Everyone who digs got there first diggin dog at some stage.Just remember some days digging are hard work.all the best with your decision whatever road you take.
At the back of my house there is a walk beside a stream.That terrier is getting handy at marking em.Usually just looks like a rat hole or under lots of wood and scrub .sometimes help her dig on a bit but 90 per cent of the work is done by lilly :-)